Frank a



F A ROSS ORB GRUSHFB.

(No Model.)

Patented May 24, 1892.

UNITED STATES PATENT OEEicEc FRANK A. Ross, on CHICAGO,

ILLINOIS, ASSIGNOR TO FRASER dn CHALMERS, OF SAME PLACE.

ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 475,347, dated May 24,1892.

Application filed October 9, 1891. Serial No. 408,233. (No model.)

To @ZZ whom t may concern.-

Beit known that I, FRANK A. ROSS, acitizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Crushers for Ores andother Materials; and I do declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My present invention relates to that class of crushers in which thematerial to be operated upon is grasped and broken between a stationaryand a moving jaw. These jaws are ordinarily provided with removablejawplates,which take the direct wear of the crushing operation and whichmay be readily renewed when worn out, thereby preservingthe integrity ofthe machine and permitting the further and continued use thereof. If,however, what maybe termed the permanent portion of the machine asdistinguished from the renewable jaw-plates is not properly protected atthe points where the impact and abrasion of the ore, stone, &c., causesa rapid wear, I have found that notwithstanding the renewal of the jaw-plates the machine willbecome in a great measure useless, althoughthe main portion of it may be in a good or perfect condition. Moreover,in order to maintain a perfect and satisfactory working of the machinethe means for securing the removable pieces in place must be adequate,and especially should th ey be positive and endur- IDU.

2Ilith such considerations in view my improvement relates to means forprotecting the permanent portions of the crushing-machine at the sidesof the jaws and for securing in place the jaw-plate which is carried bythe frame of the Crusher; and it consists in the parts and combinationsthereof hereinafter set forth and claimed.

In order to make my invention more clearly understood, I have shown inthe accompanying drawings a means for carrying it into practical eect,without, however, intending to limit the application of my improvementsto the particular construction which, for the sake of illustration, Ihave delineated.

g The invention is especially applicable to what is known in the art asthe Blake Crusher, and I have illustrated it as applied to that form ofmachine.

In said drawings, Figure lis a plan view of a Blake crusher having myimprovements applied thereto. Fig. 2 is an elevation, partly in section,of the same. Fig. 3 is a plan view, partly in section, of a portion ofthe machine, taken on a larger scale. Fig. 4 is a sectional View on line4 4, Fig. 3. Figs. 5, 6, and 7 are side, edge, and plan views of theshoe hereinafter described.

Inasmuch as the form of machine shown is well known in its details, Ishall confine my description of the drawings to those parts which embodymy invention and to the parts of the old machine which are immediatelyconnected with them.

Referring to the drawings, C C represent the stationary and removablejaws, of which c c are the removable and renewable jawplates.

B B are the side plates, fitting in recesses b, formed in the frame F ofthe crusher and shaped on one edge to engage the face of the plate Cnear the ends thereof.

A A are supplemental side plates or shoes, also fitting in the recessesb of the frame and engaging the end of the recess and the rear edge ofthe plate B. The platesA are of the tapering or wedge shape clearlyshown in Fig. 5 and are formed on their front edges with grooves a, inwhich are received the correspondingly-convex edges of the plates B. Theplate A is widest at its lower end, while the plate B is correspondinglytapered and widest at the top. Vertical or inward displacement of theshoes is prevented by bolts a', which pass through the shoes and engagethe frame F. HoriZontally-elongated holes a for these 'bolts are formedin the shoes, and also countersunk recesses a" for the bolt-heads.

From a consideration of the construction thus described it will be seenthat the permanent frame of the crusheris entirely protected from thesevere wear which takes place at the sides of the crushing-j aws. Thiswear extends to a point in the rear of the tapered edge of the sideplate B and causes the breaking off IOO the combination of the frame, astationary jaw carried thereby, renewable side plates, and renewablesupplemental side plates or f shoes on which said first-mentioned sideplates y rest and by which they are held in place,sub

tantially as set forth;

frame having recesses b, a stationary jaw, side plates in said recessesand engaging the plate of said jawand shoes A, supporting and holdingsaid plates in place and protecting the frame, substantially as setforth.

In testimony whereof I affix my signature in 3 the presence of twowitnesses.

FRANK A. ROSS.

Witnesses:

JNO. F. PACKER,

EDMoND S. TROUGHTON.

will

2. In a crusher, the combination of the

